import * as React from 'react'; /** * @internal * Checks if components was mounted the first time. * Since concurrent mode will be released in the future this needs to be verified * Currently (React 17) will always render the initial mount once * https://codesandbox.io/s/heuristic-brook-s4w0q?file=/src/App.jsx * https://codesandbox.io/s/holy-grass-8nieu?file=/src/App.jsx * * @example * const isFirstMount = useFirstMount(); */ export function useFirstMount() { const isFirst = React.useRef(true); if (isFirst.current) { isFirst.current = false; return true; } return isFirst.current; }